|Urubamba Brown Titi|
|Range||Amazon basin in the central part of Peru|
It was discovered in 2015 in a remote part of the Amazon rainforest in Peru. The specific name is given in honor of the river Urubamba, which flows through the habitat of the species. Until 2016, it was included in the genus Callicebus, but according to the results of molecular genetic studies, Byrne and colleagues were transferred to the genus Plecturocebus.
The holotype has a body length of 30 cm and a tail length of 40 cm. The fur is brown, darker on the limbs. The skin of the face is black, the ears are covered with long black hairs, the chin is brown. The fur at the base of the tail is mixed black and brownish, becoming white at the end of the tail. Hands and inner sides of hands are black. The eyes are black, the iris is light brown.